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Updated: Jul 17, 2025

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Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
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Las observaciones de un agujero negro binario de rayos X indican la formación de un disco detenido magnéticamente
Resumen
Los investigadores observaron un binario de rayos X de agujero negro, MAXI J1820 + 070, y encontraron evidencia de un disco detenido magnéticamente (MAD). Este estudio analizó datos de múltiples longitudes de onda, revelando retrasos en el flujo que apoyan la formación de MAD durante los estallidos.
Área de la Ciencia:
- La astrofísica
- Astrofísica de alta energía
- Física de los agujeros negros
Sus antecedentes:
- La acreción en los agujeros negros fortalece los campos magnéticos.
- Los discos detenidos magnéticamente (MAD) son estructuras teóricas que se predicen que se formarán cuando los campos magnéticos detengan los flujos de acreción.
- Los binarios de rayos X de agujero negro ofrecen un laboratorio único para estudiar los procesos de acreción y la dinámica del campo magnético.
Objetivo del estudio:
- Para investigar la formación y evolución de un disco detenido magnéticamente (MAD) durante una explosión del binario de rayos X del agujero negro MAXI J1820+070.
- Para analizar los datos de observación de múltiples longitudes de onda para identificar las firmas de la formación MAD.
- Para entender la interacción entre el flujo de acreción, los campos magnéticos y la actividad coronal.
Principales métodos:
- Análisis de datos de archivo de observaciones de múltiples longitudes de onda (radio, óptico, rayos X) durante el estallido de MAXI J1820+070 en 2018.
- Análisis del retraso temporal de las variaciones de flujo a través de diferentes longitudes de onda.
- Comparación de los datos de observación con las predicciones teóricas para la formación de MAD.
Principales resultados:
- Se observó un retraso significativo entre el flujo de rayos X y los flujos radio/ópticos (8 y 17 días, respectivamente).
- Los retrasos de flujo observados se interpretan como evidencia de la formación de un disco detenido magnéticamente (MAD).
- Se propone que la amplificación del campo magnético por una corona en expansión forme el MAD alrededor de la hora pico de radio.
Conclusiones:
- El estudio proporciona evidencia observacional que apoya la teoría de la formación de discos detenidos magnéticamente (MAD) en binarios de rayos X de agujero negro.
- Los retrasos observados sugieren una interacción compleja entre la acreción, la amplificación del campo magnético y la actividad coronal.
- La inestabilidad viscosa térmica en el disco externo se propone como la causa del retraso de flujo óptico.
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